Can I Build an AR-15 in Wisconsin?
Woody's answers are based on published federal and state law. Not legal advice. Consult a licensed attorney for your specific situation.
Yes, you can legally build an AR-15 in Wisconsin. The state doesn't prohibit manufacturing your own firearms for personal use, and AR-15s aren't banned under Wisconsin law.
What This Means for You
Wisconsin takes a relatively permissive approach to homemade firearms compared to many other states. You're not required to serialize your build or register it with state authorities. However, federal regulations still apply, so you need to follow ATF guidelines throughout your build process.
The Detail
Building an AR-15 in Wisconsin falls under both federal and state jurisdiction, with Wisconsin being fairly gun-friendly on this front. The state doesn't have an assault weapons ban or restrictions specifically targeting AR-platform rifles. You can legally manufacture a rifle for your own use without needing to involve an FFL or obtain special permits from the state.
Federal law still governs your build though. You must be legally eligible to possess firearms, meaning you can't be a prohibited person under federal law. If you're building from an 80% lower receiver, you're manufacturing the firearm when you complete that lower, and it becomes subject to all the same laws as any other rifle. The completed rifle must comply with federal regulations including overall length requirements and can't have certain combinations of features if you're in a jurisdiction with such restrictions.
Wisconsin doesn't require you to serialize your homemade firearm or register it with state authorities. However, you should keep records of your build including when you completed it and your eligibility to possess firearms at that time. The rifle cannot be built with the intent to sell unless you have the appropriate federal firearms license.
One area to pay attention to is if you're planning any NFA items as part of your build. Short-barreled rifles, suppressors, or other NFA items require federal tax stamps and registration regardless of Wisconsin's state laws. Wisconsin doesn't have additional state-level restrictions on most NFA items beyond federal requirements, but you still need to go through the proper ATF procedures.
Build Impact
Wisconsin's permissive laws make it one of the easier states for AR builds, with minimal state-level hurdles beyond federal compliance. You should still verify current Wisconsin statutes and any local ordinances in your area, as firearms laws can change and may vary by municipality.